In this blog post, we’ll explore how to minimize losses and effectively manage systematic and unsystematic risk in stock investing. This content is designed to help those considering a stable investment strategy.
While most people invest in stocks to grow their assets, it’s not always possible to make a profit, and the expectation of profit is always accompanied by the risk of loss. Stock investing is fundamentally based on the relationship between risk and return, and the principle applies that the higher the expected return, the higher the risk one must assume. To mitigate these risks, investors generally construct a portfolio. In doing so, they must simultaneously consider two types of risk: unsystematic risk, which occurs regardless of overall market conditions, and systematic risk, which is linked to market conditions.
The volatility and unpredictability of the stock market pose significant challenges for investors. When the economy is uncertain or rapid changes are anticipated due to external factors, investors deeply contemplate how to protect and grow their assets. This is when the importance of a portfolio becomes evident. A portfolio is a strategy that reduces risk associated with a specific asset by diversifying investments across multiple assets. Through this strategy, investors aim to manage risk by relying on a combination of various assets rather than a single stock.
Unsystematic risk refers to risks associated with specific circumstances of individual companies, such as employee strikes, management failures, or sluggish sales; it is also known as company-specific risk. Risks arising from a company’s specific circumstances can occur suddenly in unpredictable situations and can be mitigated by diversifying investments across multiple stocks. For example, investments concentrated in a specific industry can be significantly affected by an economic downturn in that industry; therefore, to avoid this, investors should diversify their assets across different industries. In other words, investment risks caused by poor sales at one company can be offset by investment returns from sales growth at another company, so investments should be spread across stocks or sectors that are not correlated with one another. Therefore, when constructing a portfolio composed of multiple stocks, unsystematic risk gradually decreases as the number of stocks increases. The effect of such diversification can enhance the stability of an investment portfolio from a long-term perspective.
On the other hand, systematic risk is related to the overall market conditions. For example, it stems from factors that affect many companies equally, such as economic fluctuations, inflation, changes in interest rates, and political and social conditions. Since systematic risk pertains to the stock market as a whole, it cannot be reduced through diversification—the method used to mitigate unsystematic risk—and is therefore also referred to as non-diversifiable risk. For this reason, investors need to closely monitor market trends and analyze how economic indicators and political events impact the stock market.
So, is there no way to address systematic risk? Investors can manage systematic risk by constructing a portfolio using the beta coefficient. The beta coefficient measures how sensitively an individual company’s stock return reacts to fluctuations in the overall stock market’s return. It indicates by what percentage the return on an individual stock changes when the return on the composite stock index changes by 1%. The beta coefficient can be described as the sensitivity of an individual stock’s return to fluctuations in the overall stock market. If the return on the composite stock index increases (or decreases) by 1% and the return on a particular stock A increases (or decreases) by 0.5%, then stock A’s beta coefficient is 0.5. In this case, if the return on Stock B increases (or decreases) by 2%, Stock B’s beta coefficient is 2. Therefore, Stock B reacts more sensitively to the overall market movement.
The beta coefficient plays a crucial role in helping investors decide how to manage stock market volatility. For example, if an investor selects stocks with high beta coefficients when an economic boom is expected, they can anticipate high returns.
However, if an economic downturn is expected, selecting stocks with a low beta coefficient can help minimize losses. Consequently, investors increase their allocation to stocks with a high beta coefficient when the stock market enters a boom. Conversely, when a downturn is anticipated, investors can minimize risk by increasing their allocation to stocks with a low beta coefficient.
This strategic approach is a key consideration in portfolio construction and management. Investors should adjust their portfolios by comprehensively considering their risk tolerance, investment objectives, and market outlook, and apply strategies utilizing beta coefficients in accordance with economic conditions. Ultimately, one must not forget that the most important aspects of investing are continuous learning and keen observation of market trends.
